STP ShaliFloor SL PU
A four-component polyurethane-cement self-levelling floor that gives food, pharma and processing plants a seamless, chemical-resistant, easy-to-clean surface built to survive steam wash-downs and thermal shock.
What is it?
A four-component PU dispersion cement-slurry self-levelling flooring system that trowel-flows into a smooth, matt, jointless surface between 4 mm and 9 mm thick.
Where is it used?
Food and beverage lines, dairies, confectionery units, pharmaceutical production, chemical plants, textile and film mills, and warehousing where floors face chemicals, wash-downs and constant traffic.
Why use it?
It marries the hygiene of a seamless PU finish with the toughness of a cementitious screed, is USFDA 175.300 compliant for food contact areas, and handles service temperatures from -20 C to +90 C.
How is it applied?
Prime the sound, dry substrate with ShaliPrime 2E, lay a 1.9 kg/m2 scratch coat, then trowel the self-levelling slurry to the target thickness and de-aerate with a spiked roller.
About STP ShaliFloor SL PU
ShaliFloor SL PU is STP Limited’s polyurethane-cement self-levelling floor, engineered for facilities where a floor has to be genuinely hygienic and genuinely hard-wearing at the same time. It is supplied as a four-part kit, resin, hardener, catalyst and a graded cementitious filler, that is blended on site and flow-applied to build a monolithic, pore-free layer. Because the binder is a PU dispersion carried in a cement matrix rather than a straight epoxy or paint film, the finished floor keeps its integrity when it is repeatedly hosed with hot water, steam-cleaned or exposed to the organic acids and cleaning chemicals that are routine in food and process environments. The result is a smooth, matt, seamless surface with no joints or grout lines for bacteria to colonise, laid at 4 mm to 9 mm depending on the duty and temperature exposure.
For specifiers in India, the appeal is the combination of credentials and practicality. The system carries USFDA 175.300 approval for indirect food contact and is rated for potable-water contact under IS 10500:2012, so it stands up to audit in HACCP and pharma settings. At the same time it delivers real mechanical numbers, roughly 50 N/mm2 compressive strength, Shore D hardness above 80, and controlled abrasion loss, which is what keeps a floor intact under pallet trucks, forklifts and process traffic. Space Arc Engineering supplies and applies ShaliFloor SL PU across Delhi NCR and pan-India, handling substrate assessment, priming and installation so the specified performance is actually achieved on the slab rather than just quoted on paper.
The technical insight
The reason a PU-cement floor outperforms a conventional epoxy in wet, hot, food-industry service comes down to how the two systems respond to heat and moisture. A rigid epoxy has a low coefficient of thermal movement and a fairly low glass-transition temperature, so a sudden hot wash-down over a cold slab sets up shear stress at the bond line and, over time, the coating debonds or cracks. ShaliFloor SL PU instead uses a polyurethane binder dispersed through a cement-filler matrix. That matrix expands and contracts at a rate much closer to the concrete beneath it, and the PU chemistry stays serviceable across a -20 C to +90 C window, so thermal-shock cycling from steam cleaning is absorbed rather than resisted. The cementitious filler also means the material is moisture-tolerant during cure and vapour-permeable in service, which is why it holds up on ground-bearing slabs where a sealed epoxy would blister from rising damp. Layered as a 1.9 kg/m2 scratch coat keyed into a primed, mechanically-prepared substrate followed by a self-levelling top, the system builds a dense, low-porosity monolith; the spiked-roller pass releases entrained air so the finished surface is closed and cleanable rather than pin-holed.
Where it is used
- Food and beverage production floors requiring daily wash-down and food-contact compliance
- Dairy, confectionery and bakery areas exposed to sugars, fats and organic acids
- Pharmaceutical and nutraceutical production suites needing seamless, auditable hygiene
- Chemical plants and process areas facing spillage of acids, alkalis and cleaning agents
- Textile and film manufacturing plants with continuous machinery and foot traffic
- Warehousing and storage bays under pallet-truck and forklift movement
- Cold and chilled zones where floors must tolerate low service temperatures
- Electronic component manufacturing and assembly floors needing a clean, dust-free finish
Key advantages
- USFDA 175.300 approved and IS 10500:2012 potable-water compliant, so it clears food, dairy and pharma audits
- Seamless, jointless, non-porous finish that leaves nowhere for bacteria or dirt to lodge and wipes clean easily
- Wide -20 C to +90 C service range with genuine thermal-shock tolerance for steam and hot-water cleaning
- Strong chemical resistance against food acids, oils, alcohols, white spirit and routine cleaning agents
- High mechanical performance, around 50 N/mm2 compressive strength and Shore D hardness above 80, for heavy traffic
- Fast application and rapid re-access, keeping plant downtime short during installation
- Moisture-tolerant cementitious matrix suits ground-bearing slabs where sealed epoxies risk blistering
- Available in several colours including grey, terracotta, mid-buff, apple green and phiroza blue for zoning
Limitations & considerations
- Short 15-minute pot life once mixed, so it demands trained applicators and disciplined batch planning
- Needs a mechanically prepared substrate with at least 1.5 N/mm2 pull-off and 25 N/mm2 compressive strength, plus a damp-proof membrane where rising moisture is a risk
- Requires a full 7-day cure before exposure to any chemical, and no traffic or sunlight for the first 24 hours
- This grade is medium-duty and self-levelling; the heaviest impact or thermal-shock zones call for a thicker heavy-duty PU screed
- Short 6-month shelf life in sealed condition and must be stored above 5 C, away from frost and direct sunlight
- Colour and matt-finish uniformity depend on site conditions, mixing consistency and correct de-aeration
Selection & best practice
Success with ShaliFloor SL PU is decided at the substrate. Mechanically prepare the concrete by captive shot-blasting or scarifying to a sound, dust-free profile, and confirm it is visibly dry with a minimum pull-off strength of 1.5 N/mm2 and compressive strength of 25 N/mm2 before priming. Where rising damp is possible, a damp-proof membrane is essential to prevent later delamination. Prime porous substrates with ShaliPrime 2E or 2E SF and let it fully dry, then key in a 1.9 kg/m2 scratch coat. Because pot life is only about 15 minutes, mix in disciplined batches, blend resin, hardener, catalyst and pigment to a uniform colour, then add filler and mix for 3 to 5 minutes until fully dispersed. Trowel the self-levelling slurry to the remaining 2 to 5 mm and pass a spiked roller through to release entrapped air, keeping the roller no more than 10 cm into the mix. Provide cut-in grooves every 4 to 5 m, sized to twice the floor thickness, to control movement. Protect the fresh floor from sunlight and all traffic for at least 24 hours, allow longer in cold weather, and hold back any chemical exposure for the full 7-day cure.
Specifications
| Product type | Four-component PU dispersion cement-slurry self-levelling floor |
| Thickness | 4 mm to 9 mm (built in multiple layers) |
| Theoretical coverage | 1.9 kg/m2 per mm of thickness |
| Compressive strength | 50 +/- 5 N/mm2 (BS 6319: Part 2) |
| Tensile strength | 7 +/- 0.5 N/mm2 (BS 6319: Part 7) |
| Flexural strength | 17 to 19 N/mm2 (BS 6319: Part 3) |
| Hardness (7 days) | Shore D greater than 80 (ASTM D2240) |
| Service temperature | -20 C to +90 C |
| Pot life / cure | 15 minutes pot life; 7-day full cure before chemical exposure |
Industry use cases
Food & Beverage
Production and packing floors that face daily hot-water and steam wash-downs, food acids and fats, backed by USFDA 175.300 food-contact approval.
Pharmaceutical & Nutraceutical
Seamless, non-porous production-suite floors that support cleanroom hygiene protocols and stand up to HACCP-style audits.
Dairy & Cold Storage
Low-temperature areas where the -20 C service rating and thermal-shock tolerance prevent the cracking that defeats rigid epoxies.
Chemical & Process Plants
Process bays exposed to spillage of acids, alkalis and solvents where the PU-cement matrix resists attack and stays cleanable.
Warehousing & Manufacturing
Traffic aisles and assembly floors under forklift and pallet-truck loading that need hard, dust-free, long-life surfaces.
Frequently asked questions
What is the coverage of ShaliFloor SL PU?
Is ShaliFloor SL PU safe for food-contact areas?
How thick should the floor be laid?
What primer and substrate does it need?
How long before the floor can be used?
How is it packed and how long does it store?
How we position STP ShaliFloor SL PU
ShaliFloor SL PU sits in STP’s flooring range as the food-grade, self-levelling PU-cement option, and it is primed with ShaliPrime 2E from the same family; heavier-duty or high-slip-risk zones can move to STP’s textured PU and epoxy screed grades, while lighter service or a decorative top may suit STP’s self-levelling epoxy (ShaliFloor SL) systems. Space Arc supplies it alongside our other brands, so where a project standardises on Fosroc or specifies a heavier PU-cement screed we can cross-quote a genuine equivalent. Being an authorised distributor and applicator for STP and the major construction-chemical brands, we advise on the right grade for the duty rather than pushing a single product.
Fosroc Nitoflor Floorcrete PU — Choose the Fosroc option when the project is standardised on Fosroc or needs a heavier-duty PU-cement topping specified for aggressive thermal-shock and abrasion service in food and process plants.
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Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.